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Induction Methods – Artificial Rupture of Membranes (AROM)

Amniotomy also known as “artificial rupture of membranes” is where the membranes are ruptured / released by the midwife using a gloved finger that has a hook on the end (amnicot) or a little device called an amnihook.

This allows the amniotic fluid to be released.

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The World Health Organisation (WHO) recommends that in normal labour there should be a valid reason to interfere with the spontaneous timing of the rupture of the membranes. Amniotomy should be reserved for women with abnormal labour progress.

One of the reasons for rupturing your membranes is if your baby needs to be monitored by a foetal scalp clip you would need your membranes to be released.

Rupturing the membranes may trigger the release of prostaglandins, which may then start your contractions as well.

Once the hook reaches the amniotic sac, the tip is pushed up against the sac with the index or middle finger of the internal hand to pierce the membranes. The hook is then pulled through the membranes with the external hand holding the handle to create a hole in the sac.

If an amniotic finger cot is being used, the pointed tip is dragged through the membranes with the finger to create the amniotomy.

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AROM Benefits


AROM Risks


Here are the RANZCOG Guidelines for induction of labour in Australian and New Zealand:




Stretch & Sweep – CLICK HERE

Balloon Catheter (Foley’s or Cook’s) – CLICK HERE

Prostaglandin Gels – CLICK HERE

Synthetic Oxytocin (Syntocinon) – CLICK HERE


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    About Vicki Hobbs

    My name is Vicki Hobbs and I am a Childbirth Educator (Back to Basics Birthing), Hypnobirthing Practitioner, Certified VBAC Educator, Remedial Massage Therapist specialising in Pregnancy & Postpartum Massage, Birth & Postpartum Doula, Certified Placenta Encapsulator, Hypnotherapist, Aromatherapist, Reiki Practitioner and Life Coach.

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